. .
q=max[q1,q2]=max(14.527,14.751)=14.751kN/m
ͼ4 ͼ
1ǿ
ͼ5 ͼ
Mmax=0.166kNm
=0Mmax/W=10.166106/24000=6.915N/mm2[f]=31N/mm2
Ҫ
2Ӷ
qk=(G1k+(G3k+G2k)h)b=(0.2+(24+1.1)350/1000)1=8.985kN/m
ͼ6 Ӷȼͼ
ͼ7 Ӷͼ
=0.572mm[]=300/400=0.75mm
. . . . .
. .
Ҫ ġ
ļٶҪϹʵʵ迼Ǵ
ɿɱؿƵϣ
q1=1.2(G1k+(G3k+G2k)h)a+1.4(Qk+
QDK)a=1.2(0.2+(24+1.1)350/1000)300/1000+1.4(2+1.350.5)300/1000=4.358kN/m
úؿƵϣ
q2=1.35(G1k+(G3k+G2k)h)a+1.40.7(Qk+
QDK)a=1.35(0.2+(24+1.1)350/1000)300/1000+1.40.7(2+1.350.5)300/1000=4.425kN/m
ȡϵã
q=max[q1,q2]=max(4.358,4.425)=4.425kN/m
ͼ8 ͼ
1ǿ
ͼ9 ͼ(kNm)
Mmax=0.266kNm
. . . . .
. .
=0Mmax/W=10.266106/(54103)=4.917N/mm2[f]=15N/mm2
Ҫ
2
ͼ10 ͼ(kN)
Vmax=1.991kN
max
=0
VmaxS/(Ib0)=11.99110340.5103/(243104410)=0.83N/mm2[]=2N/mm2
Ҫ
3Ӷ
Ӷͳƣ
qk=(G1k+(G3k+G2k)h)a=(0.2+(24+1.1)350/1000)300/1000=2.696kN/m
ͼ11 Ӷȼͼ
ͼ12 ͼ(mm)
. . . . .
. .
max
=0.239mm[]=0.81000/400=2mm
Ҫ
4֧
ѧɵã Rmax=3.762kN Rkmax=2.291kN
塢
ļٶҪϹʵʵ迼
ܵĺҪΪ㴫ļ迼أرֵΪgk=37.65/1000=0.038kN/m
ֵΪg=1.2gk=1.237.65/1000=0.045kN/m ǿȼʱͼ£
ͼ13 Ӷȼʱͼ
Ӷȼʱͼ£
ͼ14 Ӷȼʱͼ
1
. . . . .